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312979 (1999 KT4)
Classification: Mars-crossing Asteroid          SPK-ID: 2312979
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3673662656796456 4.8029e-08  
a 2.212969656164588 9.0207e-09 au
q 1.399999257517034 1.0238e-07 au
i 2.290899756215913 7.2079e-06 deg
node 111.4703904356285 0.00014272 deg
peri 127.6760132696713 0.00014373 deg
M 134.3897021731095 1.8465e-05 deg
tp 2458551.625322525312
(2019-Mar-09.12532253)
5.9327e-05 TDB
period 1202.435017548702
3.29
7.3522e-06
2.013e-08
d
yr
n .2993924783843207 1.8306e-09 deg/d
Q 3.025940054812141 1.2335e-08 au
  Orbit Determination Parameters
   # obs. used (total)      214  
   data-arc span      7473 days (20.46 yr)  
   first obs. used      1999-03-22  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64569  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:36  

Additional Information
 Earth MOID = .389534 au 
 Jupiter MOID = 1.99314 au 
 T_jup = 3.563 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457296.5 (2015-Oct-01.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3670592764087617 4.7998e-08  
q 1.400855893514306 1.0227e-07 au
tp 2457348.700575890010
(2015-Nov-22.20057589)
5.3331e-05 TDB
node 111.4828876517854 0.00014278 deg
peri 127.6233210251721 0.00014379 deg
i 2.290568894595254 7.2057e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      214  
   data-arc span      7473 days (20.46 yr)  
   first obs. used      1999-03-22  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64569  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:36  

Additional Information
 Jupiter MOID = 1.99314 au 
 T_jup = 3.563 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.303847877432379E-15 -4.904876897731549E-15 1.442618553502393E-12 -6.936124479747824E-14 4.524584871608084E-13 -8.266090695245604E-15
q -4.904876897731549E-15 1.045946091259084E-14 -2.94334337851425E-12 1.471320733151661E-13 -9.195792671447845E-13 1.718521224974537E-14
tp 1.442618553502393E-12 -2.94334337851425E-12 2.844209448382203E-9 -1.768955064574343E-11 9.37695028781206E-10 -8.224612202825735E-12
node -6.936124479747824E-14 1.471320733151661E-13 -1.768955064574343E-11 2.038679829701813E-8 -2.037228464678802E-8 5.689283299639987E-10
peri 4.524584871608084E-13 -9.195792671447845E-13 9.37695028781206E-10 -2.037228464678802E-8 2.067518095419202E-8 -5.709205455751955E-10
i -8.266090695245604E-15 1.718521224974537E-14 -8.224612202825735E-12 5.689283299639987E-10 -5.709205455751955E-10 5.192226551200962E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.7   n/a MPO494659  

312979 (1999 KT4)          Discovered 1999-May-18 by LINEAR at Socorro
Reference: 20120207/Numbers.arcLast Updated: 2012-02-09

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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